package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;


    /**
     * 新增套餐,同时保存套餐和菜品的关联关系
     *
     * @param setmealDTO
     * @return
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向套餐表中加入数据
        setmealMapper.insert(setmeal);

        //获取套餐生成的ID
        Long setmealId = setmeal.getId();


        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.stream().forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //调用mapper层分页查询
        //开启分页插件
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        //封装PageResult对象
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断套餐的状态
        /*for (Long id : ids) {
            //根据id查询菜品的信息
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
*/
        ids.forEach(id -> {
            //根据id查询菜品的信息
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品中关系表的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
       /* for (Long id : ids) {
            //根据id查询菜品的信息
            Setmeal setmeal = setmealMapper.getById(id);
            //删除套餐表中的数据
            setmealMapper.deleteById(setmeal);
            //删除套餐菜品中的数据
            setmealDishMapper.deleteBySetmealId(setmeal);
        }*/
       /* //判断菜品是否关联套餐,有的话不能删除
        //select setmeal_id from setmeal_dish where dish_id in(ids)
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsDishIds(ids);
        if(setmealIds != null&&setmealIds.size()>0){
            //当前菜品关联了套餐
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品基本信息
        dishMapper.deleteByIds(ids);
        //删除菜品口味信息
        dishFlavorMapper.deleteByDishIds(ids);*/
    }

    /**
     * 根据Id查询套餐和套餐菜品关系
     *
     * @param id
     * @return
     */
    @Override
    @Transactional
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        Setmeal setmeal = setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal, setmealVO);
        List<SetmealDish> dishList = setmealDishMapper.getDishBySetmealId(id);
        setmealVO.setSetmealDishes(dishList);
        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //1 修改套餐
        setmealMapper.update(setmeal);
        Long setmealId = setmealDTO.getId();

        //2 删除套餐和套餐的关联关系,操作setmeal_dish表,执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //3 重新插入套餐和菜品的关联关系,操作setmeal_dish表,执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐起售停售
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && dishList.size() > 0) {
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {

        return setmealMapper.getDishItemBySetmealId(id);
    }
}